Art of printing



Dec 1924- 1,519,634-

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wzzlzess: 6 L. Sc/zaesslgm Patented Dec. 16, 1924.

PATENT OFFICE.

GEORGE L. SCHUESSLER, OF CHICAGO, ILLINOIS.

ART OF PRINTING.

Application filed May 1, 1924. Serial No. 710,231.

To all whom it may concern:

Be it known that I, Gnonen L. SCI-IUESS- LER, a. citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in the Art of Printing, of which the following is a specification.

This invention relates to a method of and instrumentality for tinting surfaces by the art of printing, hereinafter referred to as tint printing; that is to say, producing upon surfaces, impressions composed of an aggregate of fine lines which, by blending with. unprinted portions of the surface presents the appearance of tinting or subdued surface coloring.

The invention proceeds upon the principle that if a printing element having its impression surface provided by fibers sufficiently loose or segregated to leave upon the imprinted surface definitions of their individual form, be inked after the usual manner of inking relief printing surfaces, and such impression surface be impressed very lightly upon the surface to be printed, the outlines of the contacting surfaces of individual fibers set off by interspersed un printed spaces will be left clearly discernible, and an effect will be produced simulating engraving, half-tone work, or effects of the so-called Ben Day process, and the density of the tinting thus produced can be varied at will by regulating the approach of the printing surface toward the surface to be tinted, with consequent determination of the relative number of sub-fibers, or fibers within the plane of the outermost fibers, to be brought to the plane of imprint; the degree of approach, however, being always restricted to one that will produce surface contact of individual discernible fibers as distinguished from solid or blurred impression of a saturated pad.

111 the accompanying drawings Figure 1 is a face view of an imprint produced by a printing form composed in part of printing elements constructed and used in accordance wit-h the present invention, and in part of printing elements or type having rigid printing faces.

Figure 2 is a transverse section of a printing form employed for producing the effect shown in Figure 1.

Figure 3 is a perspective view of another one impression made by the printing. form of Figure 3.

Figure 5 shows the effect oftwo impressio-ns of the form shown in Figure 3 with the workpiece turned so that the area which received the composition matter on the first impression will receive thetinting matter on the second impression without obliterating the composition matter, and the composition matter of the second impression will be imposed upon the tinted area: resulting from the first impression.

Figures 6 and 7 are views corresponding to Figures 4 and 5, in which the tinting effect is the result of superposed impressions from two different forms.

Figures 8 and 9 represent surface effects each resulting from an imprint of a printing element, the impression of the surface-of which is provided by a fabric woven from threadsof fibrous material, together with borders provided by rigid printing forms.

Figure 10 illustrates a method of developing double designs in a printing surface composed of a fibrous mass.

Referring to Figures 1 and 2, 1 represents a sheet of paper having imprinted thereon a frame 2 of tinted effect, letter-press matter 3, i, 5, and 6 produced by hard face printing characters or type, rules 7,8, of tinted surface effect, and a geometrical device 9 which is also of tint effect. Portions '7, 8, and 9 of the imprint shown in Figure 1 were produced by the printing elements 2, 7, 8 and 9 of the printing form shown in section in Figure 2, while the remaining parts of said imprint were pro-- duced, respectively, by the rigid type or printing elements 3, 4c, 5, and 6 of said printing form, all of said printing elements being locked up in the usual manner in a frame 10. The printing elements 2, 7 and 8 are each composed of a body portion of some rigid material, preferably wood, having printing surfaces 2", 7 b and 8 composed of masses of fibrous material, which may be either felted, woven fro-m threads of fibrous material, or otherwise assembled in a mass, provided it be left in such condition that its fibers are sufficiently free to lend to the im 1 of printing and the inst-ru'mentality for printing herein described, is that by regulat ing the pressure of the fibrous printing element the number of fibers that will reach the surface of the imprint may be varied. Thus, an. increase of pressure will naturally compact the fibersof the printing mass in a. manner to bring to the surface of imprint, through the spaces between the outermost fibers, additional "fibers which normally lie within the outermost fibers. But care must be taken to avoid too great a pressure, as this would bring so many fibers into the printing surface as to Q PPIO'ELCl'L too nearly a solid mass and destroy the effect of a; blend of lines and unprinted surface.

Another important feature of the invention resides inthe effect of combining the new printing elements with solid or rigid printing elements in the same form, in that the rigid printing elements determine the plane of arrest of the printing form and consequ'ently li-m-it pressure upon the fibrous printing elements, so that by properly deter mining the height of the fibrous printing elements, the density of their impressions may be governed and the most delicate effects insured.

As si-iggested in Figures 3 to 7. inclusive, the invention. lend-s itself successfully to the tinting of surfaces which are also to bear composition matter, and this may be effected economically even though thecomposition imprint. and tinting imprint, with respect to any given area, be made at different times. That is to say, by taking form large enough to correspond with a plurality of ultimate impressions to be made, and subjecting each workpiece to two impressions, but shifted in position so; that composition matter and tin-ting effect of the first impression will, respectively, coincide in area with the tinting effect and composition matter oft'he second impression, two complete tinted imprints bearing the composition matter will be produced, and by proper-"1y severing the resultant workpiece, two printed articles are obtained. .Tluls, F ignre 4 represents the first impression from the form of Figure 3; Figure 5 shows the result of two impressions therefrom; and similarly, Figures 6 and 7 show the effect, respectively,v of one impression and two impressions made from a form which differs from that of li igure 3 by having the fibrous printing surface made of a fabric of characteristic texture, together with a hatched or etched rigid printing form associated with the composition matter.

Figures .8 and 9 are imprints madefrom fibrous printing forms composed of open weave fibrous thread fabrics together with a rigid border printing element in each instance, and Figure 10 suggests a method of developing pattern work on a printing form having a. fibrous impression surface, as by the use of the so-called pyrex process, in which intaglio of desired outline are lnrrned into the surface, leaving the remain der of the fibrous printing surface in relief.

Some of the advantages of the process herein described, as well as the instrumentalities disclosed for carrying out such process, are that by said process and instrui-nen" dities results at least equivalent to and generally better than. those obtainable by in'evi'ously known methods are assured, without the expense of drawing, etching, or other elements of lmow-n practice. Moreover, while adapted to be used with different colors of ink on the same job, the invention lends itself for convenient and economical developi-nent of plural [color effects by the use of one and the same ink, merely by changing the density of the 1mprint developed from the fibrous printing elements, or by difierent f rb-rous print ng elements in one and the same form, which, as explained, results from determining the pressure imposed upon and the consequent degree of compression. of such fibrous elements in making the imprint. As 'compa red with ordinary plural color work, the in vention effect-s a great: saving in that it avoids the step known to the art and de fined strip-ping for color, saves one lock-up, one make-ready, one registry, one wash-up, and all but a single ink; and it saves all but a single impression multiplied by the number of copies required, as well as spoilage unavoidably incident to same.

The invention is susceptible of various changes in details without departing from the-spirit of the invention. For instance,

the art of )rintin from a form com nosed of both a fibrous printing element and a rigid printing element, may be realized by cementing upon, embedding into, or otherwise combining with a fibrous printing clen-rent, a solid printing face or element which will be brought into impress by the same operation which brings the fibrous printing surface into impress, the fibrous body being relied upon to yieldingly sustain the solid printing face in the impression plane, so that if it is more prominent than the fibrous portion of the printing element, it will retire under pressure to permit the latter to reach the impression plane. Such an arrangement is suggested at 9 in Figure 1, and 9*" in Figure 2.

I claim:

1. The improvement in the art of tint printing, which consists in pressing upon a surface to be tinted, an inked form having a fibrous impression face, the approach of the impression face to the surface being limited to a degree which leaves upon the surface delineations of the fibrous elements of the impression surface with interspersed unprinted portions of the surface.

2. The improvement in the art of tint printing, which consists in pressing upon a surface to be tinted, a form having its impression face produced from fibrous material, the fibers of which are sufficiently segregated to leave upon the printed surface their individual impressions interspersed with unprinted surface portions; the impression face being surface inked, and the approach of the printing form to the surface being restricted within a degree to prevent massing of the fiber imprints.

3. The improvement in the art of printing, which consists in impressing upon a surface to be printed, a compressible mass of inked fibers, some of which are sufficiently loose to leave a definition of individual fibers in the imprint, the approach of the mass to the surfacebeing printed being regulated to determine the proportion of fibers of the mass that meet surface contact.

a. The improvement in the art of printing which consists in simultaneously impressing a printing element having an inked surface composed of a compressible mass of fibrous material and a rigid printing element, and regulating the compression of the fibrous printing surface by the seating of the rigid printing element.

The improvement in the art of printing, which consists in simultaneously impressing, upon the material to be printed, a compressible printing element having an inked surface composed of fibrous material adapted to tint the surface with which it contacts, and a printing element of rigid character which limits compression of the compressible n'intin element, and thereafter repeating the imprint with the areas that receive the compressible and rigid elements in the first imprint, respectively, beneath the rigid and compressible element in the second imprint.

6. The improvement in the art of tint printing, which consists in the pressing upon a surface to be tinted, an inked form having its impression face composed of relatively loose superposed fibers; the approach of the printing form to the surface being established at a degree which causes individual and separately discernible imprints of the outermost fibers with interspersed spaces of unprinted surface, and with imprints of additional fibers lying within the plane of the outermost fibers, intersecting the imprints of the fibers first named, and subdividing said interspersed surface portions.

7. The improvement in the art of tint printing, which consists in impressing upon a surface to be tinted, a printing element having an impression f are constructed of fabric of individual threads composed. of fibers, the approach of the printing face to the surface being limited to a degree which leaves an impression of the pattern of the fabric defined by lines of tint printing composed of fiber impressions.

8. A printing form, composed of elements some of which have rigid impression faces and others of which have impression faces provided by a mass of fibers.

9. A printing form, composed of elements, some of which have rigid impression faces and others of which have impression faces provided by a mass of fibers, with outermost fibers sufficiently free to leave definition of individual fibers in the imprint of such elements.

10. A printing form, composed of elements, some of which have rigid impression faces, and others of which have impression faces provided by a mass of fibers; the planes of presentation of the two kinds of printing elements being such that pressure of the fiber-faced element is limited by seating of the rigid-faced element in the imprint of the form.

Signed at Chicago, Illinois, this 25th day of April, 1924.

GEORGE L. SCHUESSLER. 

